The accessory olfactory bulbs (AOBs), to which VN nerves normally
project in mammals, have not been clearly identified in humans,
raising additional questions about human VNO function. The
central target of VNO input in mammals, the amygdala, is
present in humans and does receive chemosensory input. It
probably shares some functions with the amygdala in other
mammals but whether these include the analysis of purely
vomeronasal input is not yet clear.